Futures linked to the S&P 500 were flat Tuesday night as traders awaited quarterly earnings from four of the "Magnificent Seven" stocks, as well as the conclusion of what could be Jerome Powell's final policy meeting as Federal Reserve chair. S&P 500 futures added 0.1%, while Nasdaq 100 futures rose 0.2%. Futures tied to the Dow Jones Industrial Average advanced 65 points, or 0.1%. The biggest after-hours movers included Starbucks , which jumped 5% after raising its full-year outlook . Shares